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if not modules then modules = { } end modules ['font-ocl'] = {
version = 1.001,
comment = "companion to font-otf.lua (context)",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- todo : user list of colors
local formatters = string.formatters
local otf = fonts.handlers.otf
local f_color_start = formatters["pdf:direct: %f %f %f rg"]
local s_color_stop = "pdf:direct:"
local function actualtexthandlers()
local startactualtext = nil
local stopactualtext = nil
if context then
local codeinjections = backends.codeinjections
if codeinjections then
startactualtext = codeinjections.startunicodetoactualtext
stopactualtext = codeinjections.stopunicodetoactualtext
end
end
if not startactualtext then
-- let's be nice for generic
local tounicode = fonts.mappings.tounicode16
startactualtext = function(n)
return "/Span << /ActualText <feff" .. tounicode(n) .. "> >> BDC"
end
stopactualtext = function(n)
return "EMC"
end
end
return startactualtext, stopactualtext
end
local function initializecolr(tfmdata,kind,value) -- hm, always value
if value then
local palettes = tfmdata.resources.colorpalettes
if palettes then
--
local palette = palettes[tonumber(value) or 1] or palettes[1] or { }
local classes = #palette
if classes == 0 then
return
end
--
local characters = tfmdata.characters
local descriptions = tfmdata.descriptions
local properties = tfmdata.properties
local colorvalues = { }
--
properties.virtualized = true
tfmdata.fonts = {
{ id = 0 }
}
--
local startactualtext, stopactualtext = actualtexthandlers()
--
for i=1,classes do
local p = palette[i]
colorvalues[i] = { "special", f_color_start(p[1]/255,p[2]/255,p[3]/255) }
end
--
local stop = { "special", "pdf:direct:" .. stopactualtext() }
--
for unicode, character in next, characters do
local description = descriptions[unicode]
if description then
local colorlist = description.colors
if colorlist then
local w = character.width or 0
local s = #colorlist
local n = 1
local t = {
{ "special", "pdf:direct:" .. startactualtext(unicode) }
}
for i=1,s do
local entry = colorlist[i]
n = n + 1 t[n] = colorvalues[entry.class]
n = n + 1 t[n] = { "char", entry.slot }
if s > 1 and i < s and w ~= 0 then
n = n + 1 t[n] = { "right", -w }
end
end
n = n + 1 t[n] = stop
character.commands = t
end
end
end
end
end
end
fonts.handlers.otf.features.register {
name = "colr",
description = "color glyphs",
manipulators = {
base = initializecolr,
node = initializecolr,
}
}
otf.svgenabled = true -- for now, this might change
local report_svg = logs.reporter("fonts","svg conversion")
local nofpdfstreams = 0
local f_name = formatters["svg-glyph-%05i"]
local f_stream = formatters["memstream:///svg-glyph-%05i"]
-- todo: make a plugin
local function svgtopdf(svgshapes)
local svgfile = "temp-otf-svg-shape.svg"
local pdffile = "temp-otf-svg-shape.pdf"
local command = "inkscape " .. svgfile .. " --export-pdf=" .. pdffile
-- local command = [[python "c:\Users\Hans Hagen\AppData\Roaming\Python\Scripts\cairosvg" -f pdf ]] .. svgfile .. " -o " .. pdffile
local testrun = false
local pdfshapes = { }
local nofshapes = #svgshapes
report_svg("processing %i svg containers",nofshapes)
for i=1,nofshapes do
local entry = svgshapes[i]
for j=entry.first,entry.last do
local svg = xml.convert(entry.data)
local data = xml.first(svg,"/svg[@id='glyph"..j.."']")
io.savedata(svgfile,tostring(data))
report_svg("processing svg shape of glyph %i in container %i",j,i)
os.execute(command)
pdfshapes[j] = io.loaddata(pdffile)
end
if testrun and i > testrun then
report_svg("quiting test run")
break
end
end
os.remove(svgfile)
return pdfshapes
end
local function savepdfhandler()
if context then
local setmemstream = resolvers.setmemstream
if setmemstream then
return function(pdf)
nofpdfstreams = nofpdfstreams + 1
setmemstream(f_name(nofpdfstreams),pdf)
return f_stream(nofpdfstreams)
end
end
end
return function(pdf)
nofpdfstreams = nofpdfstreams + 1
local name = f_name(nofpdfstreams)
io.savedata(name,pdf)
return name
end
end
local function initializesvg(tfmdata,kind,value) -- hm, always value
if value and otf.svgenabled then
local characters = tfmdata.characters
local descriptions = tfmdata.descriptions
local properties = tfmdata.properties
--
local svg = properties.svg
local hash = svg and svg.hash
local timestamp = svg and svg.timestamp
if not hash then
return
end
--
local pdffile = containers.read(otf.pdfcache,hash)
local pdfshapes = pdffile and pdffile.pdfshapes
if not pdfshapes or pdffile.timestamp ~= timestamp then
local svgfile = containers.read(otf.svgcache,hash)
local svgshapes = svgfile and svgfile.svgshapes
pdfshapes = svgshapes and svgtopdf(svgshapes) or { }
containers.write(otf.pdfcache, hash, {
pdfshapes = pdfshapes,
timestamp = timestamp,
})
end
if not pdfshapes or not next(pdfshapes) then
return
end
--
properties.virtualized = true
tfmdata.fonts = {
{ id = 0 }
}
--
local startactualtext, stopactualtext = actualtexthandlers()
local savepdf = savepdfhandler()
--
local stop = { "special", "pdf:direct:" .. stopactualtext() }
--
for unicode, character in next, characters do
local index = character.index
if index then
local pdf = pdfshapes[index]
if pdf then
local filename = savepdf(pdf)
character.commands = {
{ "special", "pdf:direct:" .. startactualtext(unicode) },
{ "down", character.depth or 0 },
{ "image", img.new {
filename = filename,
width = character.width,
height = character.height or 0,
depth = character.depth or 0,
} },
stop
}
character.svg = true
end
end
end
end
end
fonts.handlers.otf.features.register {
name = "svg",
description = "svg glyphs",
manipulators = {
base = initializesvg,
node = initializesvg,
}
}
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